Metallurgical furnace



(No Model.) I 2 Sheets-Sheefi 1.

M. R; CONLEY.

METALLURGICAL FURNACE. No, 477,623. Patented June 21, 1892.

WITNESSES.-

W I o L I 2H0 M M I I H BY M M%M ATTORNEYJ' 2 t e e h S W e e h s 2 L Om R EU LP L. WA Cw m U m MA T M q d o M 9 m I Patented June 21, 1892.

1 m U min. s YA. nu E w D U U 5 m F 3 U E m m m m WITNESSES.

ATTORNEY,

or any other similar material.

iliyrrnn STATES MICHAEL R. ooNLEY, or BROOKLYN, NEW YORK.

METALLURGICAL FURNACE.

SPECIFICATION forming part of Letters Patent No. 477,623, dated June 21,1892 Application filed March 26, 1891. Serial No. 386,419. (No model.)

To ml? rah/0m it may concern:

Be 1t known that 1, MICHAEL R. County, a

citizen of the United States, and a resident of 1 transferred therefromto the molten bath on the bed of the melting-hearth without exposure toatmospheric air.

The main obj eot of my invention is to utilize the waste gas of theopen-hearth meltingfurnace to heat the retorts without interfering withthe reversing principle of the reverberatory open-hearth furnace andwithout using any other regenerators than those needed for themelting-hearth.

Referring to the drawings, Figure l is a sectional elevation of myimproved furnace on the line q q, Fig. 2. Fig. 2 is a plan sectionalview of the same on line so as, Fig. 1. Fig. 3 is a sectional View online y y, Fig. 1. Fig. 4 is another sectional view on line 2 a, Fig. 1.Fig. 5 is an end view showing the retort-doors.

The open-hearth furnace A may be constructed in general after the mannerof the Siemens reverberatory steel-melting furnace, with its gas and airchecker-work or regenerators B B and melting-hearth G, with depressedroof S to throw the flame onto the bath in the hearth. The end walls D Dof this open-hearth furnace are made thicker or more extended than usualin order to receive and support at each end one or moredeoXidizing-retorts E E, made of the shape shown or any other suitableshape and of fire-clay These retorts are each provided with afilling-chute F and gas-outlet pipe G. Each is also provided with amuffle-door H, secured to the end of the retort, and in this door is asmall opening for the introduction of the slice-bar and closed by slidesI.

In Fig. 5 the slides on the left-hand door are shown as closed, while011 the right-hand door they are shown as opened for the introduction ofa suitable slice-bar. Each retort has likewise a rear outlet J openingdirectly into the melting-hearth C, but normally closed by afire-clay-slab gate K. These ret-orts are surrounded by checker or openwork L, the object of which will be presently explained. Gas and airfines m m lead from regenerators B B into the checker-work L, and fromthe checker Work chamber around the retorts there are flues n a formedin the masonry, which open into the combustion-chamber on themelting-hearth. The latter is provided with a suitable tapping-spout P,and at the opposite side suitable openings R may be provided.

The working of this combined furnace is as follows: The retorts beingshut off from the melting-hearth by the gates K are then filled with oremixed with carbon through the chutes F, which are closed after filling.The bed of the open-hearth furnace is then prepared in the ordinarymanner by scrap or pig iron to form a molten mass. The action of theopenhearth furnace is then set in motionthat is, the gas and air areadmitted into the furnace at one side, and from the regenerators on thatside they pass up the fines m or m, as the case may be, into and throughchecker-work L out through fines n (n') to the meltinghearth C, wherecombustion takes place. The waste gases or products of combustion fromthe hearth 0 pass through the fines n (n) on the opposite side of thehearth, through checker-Work L, around the retorts, and down flues m (m)into the regeuerators B B at the opposite end of the furnace. The heatof the Waste gas is intense enough to heat the retorts sufficiently todeoxidize the ore within them, and the checker or open work around theretorts facilitates this result. By reversing the action of the gas andair the retorts on the other end can be heated in a similar manner.WVhen the ore in any one of the retorts is properly deoxidized, the gateK is lifted and the sponge from the retort is discharged into the moltenmass on the melting hearth C. When the retort is emptied, the gate isclosed and the retort recharged.

One of the important features of the 0011- struction described is thatthe same regenerators which supply the air and gas to the melting-hearthand which carry off the products'of-combustion also serve for the deoX-idizing-retorts.

I am aware that it has been proposed to arrange retorts for the ore atone end of a puddling-furnace in the flues leading from thepuddling-chamber; but my invention is an open-hearth melting-furnace, sothat as the ore is deoxidized in the retorts it may be pushed directlyonto the melting-hearth and sink into the molten metal and be meltedtherein, while protected from the action of the gases by the slagcovering. I have one or more retorts at each end of the melting hearthwith reversible regenerators, so that the retortsmay be kept continuallyheated without interfering with the reverberatory or reversing action ofthe'gas and air, and consequently the proper working ofthemeltinghearthof the furnace.

I donot confine myself to any particular way of runningthe flues, solong as the objects for which they are used are carried out.

I claim as my invention- 1. A metallurgical regenerative furnace havinga melting-hearth with 'regenerators and fines connecting theregenerators with the opposite ends of the said melting-hearth, incombination with retorts having the1r 1nner ends opening directly ontothe meltinghearth, but normally closed by gates, these retorts beinginterposed in the said flues between the regenerators and the hearth atthe opposite ends of the latter, whereby'the same regenerators serve forboth melting-hearth and retorts'and on the opening of the latter the oremay be pushed directly 1n to the molten metal on the hearth,substantially as described.

' 2. A metallurgical reverberatory furnace having a melting-hearth andregenerators with fines connecting the regenerators with the hearth,closed deoXidizing-retorts 1n the said flues having their inner endsopening directly onto the melting-hearth, but normally closed by gates,and checker-work L'around the retort-s, substantially as set'forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

MICHAEL R. 'CONLEY.

Witnesses:

JOHN REVELL, GEORGE BAUMANN.

